Under nozzle-type entrained flow gasification shock chilling device and shock chilling technology

Abstract

The invention relates to an under nozzle-type entrained flow gasification shock chilling device and a shock chilling technology; the shock chilling device comprises a gasification furnace 1; a nozzle 8 is arranged at the lower part of the gasification furnace 1; wherein a gas outlet of the gasification furnace 1 is communicated with the raw gas inlet of a shock chilling tank 4; a gas outlet of the shock chilling tank 4 is connected with the raw gas inlet of a Venturi washer 11; and a gas outlet of the Venturi washer 11 is communicated with the gas inlet of a washing tower 6. Powdered or slurry coal powder and a gasification agent are sprayed to the gasification furnace 1 through the nozzle 8 to react and generate raw gas; the raw gas flows up and down in the gasification furnace 1; the raw gas is mixed with cool gas through a gas shock chiller 7 and then enters the shock chilling tank 4 to carry out water shock chilling; the gas enters the Venturi washer 11 and the washing tower 6 to be washed and purified; a part of the purified gas is conveyed to the user for use, and the other part thereof flows to the gas chiller 7 at the upper part of the gasification through thermal circulation to carry out shock chilling to the raw gas; therefore, the raw gas contains more water vapor. The device and the technology are characterized by low construction cost and high system overall efficiency.

Description

technical field [0001] The invention relates to the technical field of coal gasification, in particular to a lower nozzle type entrained bed gasification quenching device and a quenching process. Background technique [0002] The clean and efficient utilization of coal is a major technical issue in the field of energy and environmental protection in the world today, and it is also one of the key technologies for the sustainable development of my country's national economy and society. Coal gasification technology, as a leading technology for coal deep processing and transformation, is the key to clean coal technology. Coal gasification refers to putting coal in the gasifier. Under certain temperature and pressure conditions, a series of chemical reactions occur between the organic matter in the coal and the gasification agent such as steam / air or oxygen, and the solid coal is converted into CO, h 2 、CH 4 Combustible gases such as CO and 2 , N 2 and other non-combustible...

AI Technical Summary

Problems solved by technology

[0009] In the past, the dry gasification process was mainly aimed at power generation. It used dry dust removal, and a huge gas cooler system was added behind the gasification furnace. The equipment structure was complex and the manufacturing cost was relatively high. Feed in the form of coal slurry, and the feed composition contains a lot of water, resulting in low gasification temperature and a large loss of heat energy, which greatly limits the range of coal types that can be gasified. At the same time, the refractory brick structure used in the gasifier makes the operating cycle shorter And it needs to be replaced regularly, and a furnace is needed for equipment, which increases the operating cost

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